this is cell phone video of police in riot gear near california and battery streets. police say a group of demonstrators marched in that area, vandalizing cars and businesses along the way. when police intervene, protesters reportedly threw flares and bags of paint and rocks at the officers. one officer was hit in the head but is expected to be okay. many of the protesters wore masks, and police say some were armed with hammers. the visitors were warned, traffic can be terrible but today, getting into san francisco really was not terrible at all. here's a life look at the toll plaza. traffic is flowing smoothly and it has been flowing smoothly all day as well. we have crews throughout the city and one in detroit, covering the oakland as. we want to begin with jamie sire who is at at&t park for the giants who suffered a tough loss. >> reporter: normally when the opposing pitcher leaves after eight pitches, it would bode well for the home team. unfortunately for the giants, they could not capitalize on that early opportunity and they do drop game one against the reds. >